CN103560055A - Permanent magnet variable air gap limited rotation angle motor operation mechanism of high-voltage breaker - Google Patents
Permanent magnet variable air gap limited rotation angle motor operation mechanism of high-voltage breaker Download PDFInfo
- Publication number
- CN103560055A CN103560055A CN201310578281.4A CN201310578281A CN103560055A CN 103560055 A CN103560055 A CN 103560055A CN 201310578281 A CN201310578281 A CN 201310578281A CN 103560055 A CN103560055 A CN 103560055A
- Authority
- CN
- China
- Prior art keywords
- breaker
- air gap
- permanent magnet
- transmission
- rotor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention provides a permanent magnet variable air gap limited rotation angle motor operation mechanism of a high-voltage breaker, and belongs to the technical field of electric transmission and transformation equipment. The permanent magnet variable air gap limited rotation angle motor operation mechanism mainly comprises a drive motor, a motor controller and a transmission mechanism. The drive motor directly drives the transmission mechanism to carry out three-phase mechanical linkage of the breaker. According to the permanent magnet variable air gap limited rotation angle motor operation mechanism, a segmented variable air gap structure is adopted, mechanical performance of the drive motor is matched with the motion characteristic of the breaker, the structure improves work efficiency of the drive motor, mechanical impact of the operation mechanism is reduced, and the mechanical service life of the operation mechanism is prolonged. A permanent magnetic limiting retaining device and a dead point anti-bouncing limiting structure can effectively limit the motion range of the operation mechanism according to the motion requirements of the breaker, the structure is simple, the performance is reliable, the dead point anti-bouncing limiting structure is reasonable in design and makes full use of the characteristics of the transmission mechanism, switch-on bouncing of the breaker is effectively avoided, and switch-on and switch-off reliability of the operation mechanism and the breaker is improved.
Description
Technical field
The invention belongs to power transmission and transforming equipment technical field, particularly a kind of primary cut-out permanent magnetism becomes air gap finite angle electric operating mechanism.
Background technology
Primary cut-out is switchgear important in electric power system, has control and protection dual-use function, significant to the safe operation of electric power system.Operating mechanism is relevant to the performance of circuit breaker, directly affects the reliability and stability of circuit breaker work.Conventional circuit breaker operating mechanism is mainly electromagnetic operating mechanism, spring operating mechanism, pneumatic operating mechanism and hydraulic actuating mechanism, these operating mechanism complex structures, and moving component is many, and controllability and reliability are not good.Complicated operating mechanism causes the response time of operating mechanism long, dispersed large, and its structure can not meet kinetic characteristic and the operating characteristic of circuit breaker completely, thereby cannot meet modern power systems to the intelligentized requirement of breaker operator.
Summary of the invention
The defect existing for prior art, the object of the invention is to solve that conventional high-tension breaker operation mechanism motion parts are many, on the basis of the shortcoming such as complicated mechanism, mechanism's controllability and reliability deficiency, provide a kind of primary cut-out permanent magnetism to become air gap finite angle electric operating mechanism, utilize a finite angle magneto directly to drive circuit breaker action, simplify moving component, improved functional reliability and the motion controllability of operating mechanism.
Technical scheme of the present invention is achieved in that a kind of primary cut-out permanent magnetism becomes air gap finite angle electric operating mechanism, mainly by drive motors, electric machine controller and transmission mechanism, formed, by a direct drive transmission device of drive motors, carry out circuit breaker three phase mechanical linkage, described electric machine controller is connected with drive motors end by shielding conductor;
Described transmission mechanism is a set crank link structure, mainly by three driving cranks, formed, each driving crank is mainly comprised of transmission main shaft, transmission crank arm, kinematic link and insulated tension pole, the output main shaft of drive motors is connected with rotating spindle by abutted flange dish, three driving cranks are equally spaced and are connected with transmission main shaft key by transmission Abduction arm one end, realize coaxial rotating; Transmission Abduction arm other end connection for transmission connecting rod one end, the kinematic link other end connects one end of insulated tension pole, and the other end of insulated tension pole is connected to arc-extinguishing chamber of circuit breaker through touch spring;
Described drive motors is mainly comprised of rotor, armature winding, electric machine main shaft, motor stator, the spacing holding device of permanent magnetism and hall position sensor, described rotor, the spacing holding device of permanent magnetism and hall position sensor are assemblied on electric machine main shaft successively, and are connected with axle key with electric machine main shaft; Armature winding is wound in the peariform slot of motor stator, adopts the arrangement mode of concentrating the whole distance of individual layer; On described rotor, be also provided with permanent magnet, permanent magnet is embedded on rotor successively, between adjacent two permanent magnets, is provided with non-magnetic interval insulant; Between motor stator and permanent magnet, for becoming gap structure, each permanent magnet adopts segmental structure, between motor stator and permanent magnet, has different gas length δ
1, δ
2and δ
3, and have δ
1> δ
3> δ
2, this gap structure makes corresponding to breaker open operation motion process, and in the contacting travel stage, gas length is less, thereby obtains larger just-off speed; After just dividing, 3/4 opened apart from the stage, and gas length is minimum, obtains the fastest average separating brake rotating speed, reaches the speed characteristics requirement of circuit breaker; Before open position, 1/4 opens distance, and gas length is maximum, and motor output torque is reduced, and has reduced motor speed, thereby has reduced the mechanical shock to motor and circuit breaker.
The spacing holding device of permanent magnetism is mainly comprised of permanent magnetic material, spacing rotor and buting iron, described spacing rotor is connected by flat key with electric machine main shaft, permanent magnetic material is embedded in buting iron, and spacing rotor carries out finite angle motion in the fluting of shelves iron, by buting iron, is undertaken spacing.
Between described kinematic link and insulated tension pole, be also connected with insulated tension pole connector, shackle rod and insulated tension pole all with insulated tension pole connector chain connection.
Between described insulated tension pole and touch spring, be also connected with contact of breaker spring connector, described insulated tension pole and touch spring are threaded with contact of breaker spring connector.
Described motor stator is built up by DW470 type silicon steel sheet, and rotor adopts No. 10 forgings to make.
When described spacing rotor forwards separating brake or closing position to, the permanent magnetic attraction that utilizes permanent magnet to produce is pulled together spacing rotor and buting iron, makes circuit breaker in the maintenance of divide-shut brake position; Transmission mechanism is when moving to breaker closing position, and transmission mechanism just moves to over ，Qie dead-centre position, dead-centre position and closing position angulation should be less than 3 °, exempts from the resilience of moving contact under the effect of touch spring, realizes effectively spacing.
Described rotor is selected N40 type Nd-Fe-B permanent magnet.
Beneficial effect of the present invention: primary cut-out permanent magnetism proposed by the invention becomes air gap finite angle electric operating mechanism, and tool has the following advantages:
(1) the high-pressure vacuum breaker permanent magnetism that the present invention proposes becomes air gap finite angle electric operating mechanism to be improved current conventional breaker operation mechanism principle.The motor shaft that motion driver part in traditional operating mechanism is reduced to unique parts rotation, has greatly reduced operating mechanism parts, has improved the reliability of operating mechanism.Adopt motor to drive circuit breaker, speed responsive is fast, and control precision is high, and motion process controllability is good.
(2) the operating mechanism permanent magnet drive motor that the present invention proposes, according to the speed characteristics requirement of primary cut-out, adopts segmentation to become gap structure, and drive motors is matched with the kinetic characteristic of circuit breaker on exercise performance.This structure has improved the operating efficiency of drive motors, has reduced the mechanical shock of operating mechanism, has increased the mechanical endurance of operating mechanism.
(3) the spacing holding device of permanent magnetism that the present invention proposes and dead point bounce-proof position limiting structure can require effectively to limit according to the motion of circuit breaker the range of movement of operating mechanism, simple in structure, dependable performance.Dead point bounce-proof position limiting structure appropriate design also makes full use of the feature of transmission mechanism self, thereby effectively avoids the closing rebound of circuit breaker, has improved the reliability that operating mechanism and circuit breaker close closing operation.
Accompanying drawing explanation
Fig. 1 is that embodiment of the present invention primary cut-out permanent magnetism becomes air gap finite angle electric operating mechanism overall structure schematic diagram;
Fig. 2 is the structural representation of embodiment of the present invention drive motors;
Fig. 3 is for becoming gap structure schematic diagram between embodiment of the present invention motor stator and permanent magnet;
Fig. 4 is the spacing holding device structural representation of embodiment of the present invention drive motors permanent magnetism;
Fig. 5 is that embodiment of the present invention primary cut-out permanent magnetism becomes air gap finite angle electric operating mechanism dead point bounce-proof position limiting structure schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the present invention are described in further detail.
Present embodiment be take 126kV vacuum circuit-breaker as example, the requirement according to arc control device to operating mechanism, and the primary cut-out permanent magnetism of employing becomes air gap finite angle electric operating mechanism, as shown in Figure 1.Primary cut-out permanent magnetism becomes air gap finite angle electric operating mechanism and is arranged on circuit breaker limit phase position, mainly by drive motors 1, and electric machine controller 2, transmission mechanism 3 forms, and adopts a motor direct-drive transmission mechanism to carry out the three phase mechanical linkage of circuit breaker.
The output main shaft of drive motors 1 and the transmission main shaft 6 in transmission mechanism 3 link together by ring flange 4, one end of transmission crank arm 5 in transmission mechanism 3 is connected by flat key with transmission main shaft 6, the other end of transmission crank arm 5 and kinematic link 7 are connected through the hinge, the two ends of kinematic link 7 are connected through the hinge with transmission crank arm 5 and insulated tension pole connector 8 respectively, the two ends up and down of insulated tension pole 9 are fixing by screw thread and contact of breaker spring connector 10 and insulated tension pole connector 8 respectively, contact of breaker spring joint 10 is connected with arc-extinguishing chamber of circuit breaker 12 through touch spring 11.Electric machine controller 2 is connected with drive motors 1 end by the shielded communication line of drawing.When primary cut-out operates, first electric machine controller 2 detects the position of rotor 17 by hall position sensor 19, then according to the position signalling detecting, drive drive motors 1 rotation, during drive motors 1 rotation, by transmission main shaft 6, drive transmission crank arm 5, kinematic link 7 around transmission main shaft 6 transmissions, and then drive insulated tension pole 9 vertically to move, and finally drive the moving contact motion in arc control device 12, realize the actuating of circuit breaker.
The structure of drive motors 1 as shown in Figure 2.Mainly comprise armature winding 13, motor permanent magnet 14, electric machine main shaft 15, non-magnetic interval insulant 16, rotor 17, the spacing holding device 18 of permanent magnetism, hall position sensor 19 and motor stator 20.Drive motors 1 radially assembles electric machine main shaft 15, rotor 17, motor permanent magnet 14, armature winding 13 and motor stator 20 from inside to outside successively.4 permanent magnets 14 are embedded in rotor 17 surfaces, are provided with non-magnetic interval insulant 16 between adjacent permanent magnet.The spacing holding device 18 of permanent magnetism is connected on rotor 17 with axle key, and hall position sensor 19 is placed in electric machine main shaft 15 ends.Motor stator 20 is built up by DW470 type silicon steel sheet, and rotor 17 and electric machine main shaft 15 select No. 10 forgings to make, and the model of motor permanent magnet 14 is N40 type Nd-Fe-B permanent magnet.
Between motor stator and permanent magnet, for becoming gap structure as shown in Figure 3, each piece permanent magnet adopts segmental structure, and the permanent magnet by the same polarity of 3 segment forms respectively, and every a bit of corresponding gas length is respectively δ
1, δ
2and δ
3.For 126kV vacuum circuit-breaker, every a bit of corresponding gas length is followed successively by 5mm, 1mm and 3mm.This change gap structure is corresponding to breaker open operation motion process, in the contacting travel stage, in the contacting travel stage, gas length is less (between 1～5mm, in present embodiment, getting gas length is 3mm), air gap flux density is larger, and the electromagnetic torque that drive motors is provided is larger, thereby can make circuit breaker obtain larger just-off speed; After just minute, 3/4 opened apart from the stage, and gas length is minimum, is 1mm, and the electromagnetic torque that under this gas length, drive motors provides is maximum, can reach average separating brake rotating speed that acquisition is the fastest to meet the speed characteristics requirement of circuit breaker; Before open position, 1/4 opens distance, and gas length is maximum, is 5mm, and motor output torque is reduced, and is conducive to reduce the mechanical shock to motor and circuit breaker.Become gap structure and guaranteed that from structure the speed characteristics of drive motors and circuit breaker match.
As shown in Figure 5, OA1 is connecting lever to operating mechanism dead point bounce-proof position limiting structure principle, and A1B1 is kinematic link, and OO ' is transmission main shaft, B
1(A
1), B
3(A
4) be respectively combined floodgate initial time (separating brake stops constantly) and the termination end position of (separating brake initial time) kinematic link constantly that closes a floodgate.Transmission mechanism is when moving to breaker closing position, and transmission mechanism just moves to over 2 ° of dead-centre positions, can utilize like this mechanism dead point effectively to prevent the mechanical springing because of the shock generation of spacing rotor and spacing buting iron.Meanwhile, utilize mechanism dead point can effectively keep away the bounce that overcomes road device touch spring, realize reliably and close a floodgate and keep.
Although more than described the specific embodiment of the present invention, the those skilled in the art in this area should be appreciated that these only illustrate, and can make various changes or modifications to these execution modes, and not deviate from principle of the present invention and essence.Scope of the present invention is only limited by appended claims.
Claims (7)
1. a primary cut-out permanent magnetism becomes air gap finite angle electric operating mechanism, it is characterized in that: mainly by drive motors (1), electric machine controller (2) and transmission mechanism (3), formed, by the direct drive transmission device (3) of a drive motors (1), carry out circuit breaker three phase mechanical linkage, described electric machine controller (2) is connected with drive motors (1) end by shielding conductor;
Described transmission mechanism (3) is a set crank link structure, mainly by three driving cranks, formed, each driving crank is mainly comprised of transmission main shaft (6), transmission crank arm (5), kinematic link (7) and insulated tension pole (9), the output main shaft of drive motors (1) is connected with rotating spindle (6) by abutted flange dish, three driving cranks are equally spaced and are connected with transmission main shaft (6) key by transmission Abduction arm (5) one end, realize coaxial rotating; Transmission Abduction arm (5) other end connection for transmission connecting rod (7) one end, kinematic link (7) other end connects one end of insulated tension pole (9), and the other end of insulated tension pole (9) is connected to arc-extinguishing chamber of circuit breaker through touch spring;
Described drive motors (1) is mainly comprised of rotor (17), armature winding (13), electric machine main shaft (15), motor stator (20), the spacing holding device of permanent magnetism (18) and hall position sensor (19), it is upper that described rotor (17), the spacing holding device of permanent magnetism (18) and Hall current sensor (19) are assemblied in electric machine main shaft (15) successively, and be connected with axle key with electric machine main shaft (15); Armature winding (13) is wound in the peariform slot of motor stator (17), adopts the arrangement mode of concentrating the whole distance of individual layer; On described rotor (17), be also provided with permanent magnet (14), it is upper that permanent magnet (14) is embedded at rotor (17) successively, between adjacent two permanent magnets, is provided with non-magnetic interval insulant; Between motor stator (20) and permanent magnet (14), for becoming gap structure, each permanent magnet (14) adopts segmental structure, between motor stator (20) and permanent magnet (14), has different gas length δ
1, δ
2and δ
3, and have δ
1> δ
3> δ
2, this gap structure makes corresponding to breaker open operation motion process, and in the contacting travel stage, gas length is less, thereby obtains larger just-off speed; After just dividing, 3/4 opened apart from the stage, and gas length is minimum, obtains the fastest average separating brake rotating speed, reaches the speed characteristics requirement of circuit breaker; Before open position, 1/4 opens distance, and gas length is maximum, and motor output torque is reduced, and has reduced motor speed, thereby has reduced the mechanical shock to motor and circuit breaker.
2. primary cut-out permanent magnetism according to claim 1 becomes air gap finite angle electric operating mechanism, it is characterized in that; The spacing holding device of permanent magnetism (18) is mainly comprised of permanent magnetic material (22), spacing rotor (21) and buting iron (23), described spacing rotor (21) is connected by flat key with electric machine main shaft (15), permanent magnetic material (22) is embedded in buting iron (23), spacing rotor (21) carries out finite angle motion in the fluting of shelves iron (23), by buting iron (23), is undertaken spacing.
3. primary cut-out permanent magnetism according to claim 1 becomes air gap finite angle electric operating mechanism, it is characterized in that: between described kinematic link (7) and insulated tension pole (9), be also connected with insulated tension pole connector (8), shackle rod (7) and insulated tension pole (9) all with insulated tension pole connector (8) chain connection.
4. primary cut-out permanent magnetism according to claim 1 becomes air gap finite angle electric operating mechanism, it is characterized in that: between described insulated tension pole (9) and touch spring (11), be also connected with contact of breaker spring connector (10), described insulated tension pole (9) and touch spring (11) are threaded with contact of breaker spring connector (10).
5. primary cut-out permanent magnetism according to claim 1 becomes air gap finite angle electric operating mechanism, it is characterized in that: described motor stator (20) is built up by DW470 type silicon steel sheet, and rotor (17) adopts No. 10 forgings to make.
6. primary cut-out permanent magnetism according to claim 1 becomes air gap finite angle electric operating mechanism, it is characterized in that: when described spacing rotor (21) forwards separating brake or closing position to, the permanent magnetic attraction that utilizes permanent magnet (14) to produce is pulled together spacing rotor (21) and buting iron (23), makes circuit breaker in the maintenance of divide-shut brake position; Transmission mechanism (3) is when moving to breaker closing position, transmission mechanism just moves to over dead-centre position, and dead-centre position and closing position angulation should be less than 3 °, exempt from the resilience of moving contact under the effect of touch spring (11), realize effectively spacing.
7. primary cut-out permanent magnetism according to claim 1 becomes air gap finite angle electric operating mechanism, it is characterized in that: described rotor (17) is selected N40 type Nd-Fe-B permanent magnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310578281.4A CN103560055B (en) | 2013-11-16 | 2013-11-16 | A kind of high-voltage breaker permanent magnet becomes air gap finite angle electric operating mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310578281.4A CN103560055B (en) | 2013-11-16 | 2013-11-16 | A kind of high-voltage breaker permanent magnet becomes air gap finite angle electric operating mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103560055A true CN103560055A (en) | 2014-02-05 |
| CN103560055B CN103560055B (en) | 2015-08-26 |
Family
ID=50014273
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310578281.4A Active CN103560055B (en) | 2013-11-16 | 2013-11-16 | A kind of high-voltage breaker permanent magnet becomes air gap finite angle electric operating mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103560055B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105244198A (en) * | 2015-10-29 | 2016-01-13 | 国网山西省电力公司电力科学研究院 | High-voltage breaker dynamic winding type variable air gap permanent magnetic linear motor operation mechanism |
| CN106057559A (en) * | 2016-07-21 | 2016-10-26 | 国网山西省电力公司电力科学研究院 | GIS disconnector capable of reducing fast transient overvoltage |
| CN106783353A (en) * | 2016-11-28 | 2017-05-31 | 唐恩(厦门)电气有限公司 | A kind of operating mechanism of disconnecting switch |
| CN111354580A (en) * | 2018-12-20 | 2020-06-30 | Abb瑞士股份有限公司 | Actuator for medium voltage circuit breaker |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5041749A (en) * | 1989-10-30 | 1991-08-20 | Iskra Electromorji | High speed, high power, single phase brushless DC motor |
| CN1659768A (en) * | 2002-06-04 | 2005-08-24 | 波峰实验室责任有限公司 | Rotary permanent magnet electric motor with varying air gap between interfacing stator and rotor elements |
| CN102497039A (en) * | 2011-12-19 | 2012-06-13 | 周智庆 | Novel built-in permanent magnet type variable reluctance motor for stator |
| CN203674117U (en) * | 2013-11-16 | 2014-06-25 | 沈阳工业大学 | High voltage breaker permanent magnetic variable air gap limited angle motor operation mechanism |
-
2013
- 2013-11-16 CN CN201310578281.4A patent/CN103560055B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5041749A (en) * | 1989-10-30 | 1991-08-20 | Iskra Electromorji | High speed, high power, single phase brushless DC motor |
| CN1659768A (en) * | 2002-06-04 | 2005-08-24 | 波峰实验室责任有限公司 | Rotary permanent magnet electric motor with varying air gap between interfacing stator and rotor elements |
| CN102497039A (en) * | 2011-12-19 | 2012-06-13 | 周智庆 | Novel built-in permanent magnet type variable reluctance motor for stator |
| CN203674117U (en) * | 2013-11-16 | 2014-06-25 | 沈阳工业大学 | High voltage breaker permanent magnetic variable air gap limited angle motor operation mechanism |
Non-Patent Citations (1)
| Title |
|---|
| 李永祥等: "高压断路器有限转角永磁电机操动机构两种定子结构", 《电工技术学报》, vol. 25, no. 5, 31 May 2010 (2010-05-31), pages 61 - 67 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105244198A (en) * | 2015-10-29 | 2016-01-13 | 国网山西省电力公司电力科学研究院 | High-voltage breaker dynamic winding type variable air gap permanent magnetic linear motor operation mechanism |
| CN106057559A (en) * | 2016-07-21 | 2016-10-26 | 国网山西省电力公司电力科学研究院 | GIS disconnector capable of reducing fast transient overvoltage |
| CN106783353A (en) * | 2016-11-28 | 2017-05-31 | 唐恩(厦门)电气有限公司 | A kind of operating mechanism of disconnecting switch |
| CN111354580A (en) * | 2018-12-20 | 2020-06-30 | Abb瑞士股份有限公司 | Actuator for medium voltage circuit breaker |
| CN111354580B (en) * | 2018-12-20 | 2022-07-15 | Abb瑞士股份有限公司 | Actuator for medium voltage circuit breaker |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103560055B (en) | 2015-08-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201788887U (en) | Direct-acting vacuum breaker equipped with bistable permanent-magnetic operating mechanism | |
| CN103560055B (en) | A kind of high-voltage breaker permanent magnet becomes air gap finite angle electric operating mechanism | |
| CN101901718A (en) | Direct-acting vacuum circuit breaker with bistable permanent magnet actuators | |
| CN201112159Y (en) | Automatic changeover using permanent magnetic operating mechanism | |
| CN102426975A (en) | Permanent magnetic operation mechanism | |
| CN203674117U (en) | High voltage breaker permanent magnetic variable air gap limited angle motor operation mechanism | |
| CN103560056B (en) | Primary cut-out is brushless coil excitation direct current machine operating mechanism | |
| CN105244198A (en) | High-voltage breaker dynamic winding type variable air gap permanent magnetic linear motor operation mechanism | |
| CN201294199Y (en) | Manual brake-dividing device for high voltage AC vacuum circuit breaker | |
| CN205656975U (en) | A cylinder metallic glass permanent magnet synchronous linear motor operating mechanism for circuit breaker | |
| CN202339884U (en) | Permanent operating mechanism | |
| CN106229232B (en) | The divide-shut brake coil control circuit of long-stroke permanent magnet mechanism | |
| CN101447362A (en) | Permanent magnet swing angle electric operating mechanism of high voltage circuit breaker | |
| CN205122408U (en) | High voltage circuit breaker moves winding formula and becomes air gap permanent magnetism linear electric motor operating mechanism | |
| CN101236856B (en) | Operation machine for cylinder permanent magnetic line motor of high-voltage breaker | |
| CN203644579U (en) | Hand-operated opening device of monostable permanent magnetic mechanism | |
| CN201725698U (en) | Permanent magnetic actuator | |
| CN201387838Y (en) | High-voltage circuit breaker of pulse-driven linear motor type magnetic mechanism | |
| CN201845710U (en) | Arc extinguishing circuit of AC relay | |
| CN201956873U (en) | Permanent-magnet linear motor with clamping function | |
| CN201188392Y (en) | Cylinder type permanent magnet linear motor operation mechanism for high-voltage circuit-breaker | |
| CN113936934B (en) | Rotary bistable permanent magnet operating mechanism and working method thereof | |
| CN206040508U (en) | Non - symmetric winding motor operating mechanism of high voltage circuit breaker | |
| CN2624377Y (en) | Vacuum automatic circuit recloser | |
| CN205487932U (en) | Outdoor interchange high pressure permanent magnetism vacuum circuit breaker |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |